Welcome to the fun world of magic! Iruma Suzuki, a good-natured boy who can't refuse a favor, happens to become the grandson of Sullivan, the great demon of the demon world! Iruma, who is doted on by Sullivan, is sent to a demon school where Sullivan serves as the director.... Although he wishes to live a peaceful school life while hiding his human identity, for some reason Iruma is always the center of attention. He gets into fights with the elite demons, is befriended by a rare(?) female demon, and is even the center of attention. Iruma is also the target of the attention of the strict student council president. Iruma overcomes one trouble after another with her own kindness!